YAY - FIXED IT! So I had the same problem. My Sony Xperia Z3 wont charge and wont talk to my PC. If I try to charge it, the red led will blink for a moment and then...nothing I´ve tryed the master reboot volum down thing and a bunch of difrent charges but, no luck. Just get that brief red led blink and then...nothing. What I did But then I bought a (cheap) portable mobil battery charger and HUREKA it worked!! Charged the lipstick sized mobile charger all the way up. The pluged it in my mobile and...my phone started to charge. No red led blink no it just keept going. After it charged from the portable charger one time, it now runs normal again, and I can use my normal wall socket USB charger witk no problem. Why it worked? I dont know...Maybe it´s something to do with tincreased current so the cheap charger will charge with more a mperage, and somehow then unclog the phones battery. Hope it helped.
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